C ++ programming thoughts (version 2) Chapter 1 C (notes, exercises, and answers) in C ++ (I) and answers to java programming thoughts
I. Summarize the content of this chapter:
1. if the declared pointer is void *, it means that any type of address can indirectly reference the pointer (and if int * is declared, it can only indirectly reference the pointer to the
The problem with Python exercises is as follows:Summary: The bonus paid by the enterprise is based on the profit commission. Profit (I) less than or equal to $100,000, the bonus can be raised by 10%, the profit is higher than $100,000, less than $200,000, the portion of less than 100,000 yuan by 10% commission, higher than the portion of 100,000 yuan, a commission of 7.5%, 200,000 to 400,000, higher than 200,000 yuan, can commission 5% , between 400,0
Python programming Quick Start-making tedious work automated-chapter two exercises and their answers 1, what are the two values of the Boolean data type? How do I spell it?A: True and false, use uppercase T and uppercase F, and the other letters are lowercase.What are the 2, 3 Boolean operators?Answer: And, or, and not.3. Write the truth table for each boolean operator (i.e., each possible combination of op
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operation:Back Time-Front timeDate subtraction The default result is the difference in daysMonths_between (Back Time-front time)Months_between default return result is the number of months differenceB. Value of date takenExtract functionExtract (year from Sysdate)3. Paging QueryRownum:oracle-specific keywords for pagingA. Nested implementation paging QueryPaged queries are nested with two queries, internal queries are used to specify upper bounds, and result sets return rownum, and external que
execution fails, the following command is ignored.
|| : If one command executes successfully in multiple commands, the following command is ignored, otherwise the following command is run.
16. What if you just want to let a user use a variable?VIM/HOME/USERNAME/.BASHRC add a line of export abc=123 and then SOURCE/HOME/USERNAME/.BASHRC17. Which command will be used to list all the variables in the system and the current user defined custom variables?SetThis article is from the "fragrant
best way to do this is to sort by (). (2 points)
Hill
Bubble
Fast
Exchange
Author : ShangUnit : City College of Zhejiang University2-29(Neuds) The record with the highest key value from the sequence to be sorted is placed in an ordered sequence called (). (2 points)
Hill sort
Direct Select sort
Bubble sort
Quick Sort
Title Answer result Score2-3d Answer right 22-4c Answer right 22-5A Answer right 22-6b Answer right 22-7c Answer right 22-8c Ans
student's school number, name and average score;Select Student.sid,student.sname,b.numname from (select Student_id,avg (num) as Numname from score GROUP by student_id HAVI NG AVG (num) >60) as Bleft JOIN student on B.student_id=student.sid4, inquiry all students of the school number, name, number of courses selected, total;SELECT Student_id,student.sname,count (course_id), SUM (num) from score left JOIN student on Score.student_id=student.sid GROUP by student_id5, inquire the surname "Li" the n
Tags: research and Development Select Table Practice ISA Relationship Comm varchar ExercisesOne, the existing three database tables, respectively, the Department table, Staff table, Department and Employee Relations table 1. Department tableCREATE TABLE ' t_dept ' (' ID ' int (8) not NULL auto_increment,' Dept_name ' varchar (the DEFAULT NULL COMMENT ' Department '),PRIMARY KEY (' id ')) CHARACTER SET UTF8 COLLATE utf8_general_ci comment= ' departmental table ID is the primary key '; 2. Employee
Exercises 5.1How will prolog answer the following questions?1. X = 3*4.2. X is 3*4.3.4 is X.4. X = Y.5.3 is 1+2.6.3 is + (.).7.3 is x+2.8. X is 1+2.9.1+2 is 1+2.Is (X, + ()).11.3+2 = + (3,2).12. * (7,5) = 7*5.13. * (7, + (3,2)) = 7* (3+2).14. * (7, (3+2)) = 7* (3+2).15.7*3+2 = * (7, + (3,2)).16. * (7, (3+2)) = 7* (+ (3,2)).My answers and explanations:1. Prolog will answer:X = 3*4, because this is a unity. 2
crinimal likes a ' Big Kahuna burger 'A crinimal likes every crinimalA crinimal likes every ' Big Kahuna burger '...Exercises 2.4 Complete the following crossword puzzlesThere are 6 Latin words below:Astente, Astoria, Baratto, Cobalto, Pistola, Statale.They are assigned to the following puzzle Gangzhong:The following Knowledge base is a simple thesaurus of these words:Word (Astante, a,s,t,a,n,t,e). Word (Astoria, a,s,t,o,r,i,a). Word (Baratto, b,a,r,
Chapter three function exercises and their answers 1. Why is it good to add a function to a program?A: The function reduces the duplicated code. This makes the program shorter, easier to read, and easier to modify.2. When does the code in the function execute: When the function is defined, or when the function is invoked?A: The code in the function executes when the function is invoked, not when the functio
(3) Create the/mnt/find.all file and save all output to this filefind/etc/-namepasswd >/mnt/file.all(4) Save all output to/mnt/find.all again, and keep the source file contentsfind/etc/-namepasswd >>/mnt/file.all# #即将所有的内容再次保存到file. All, do not overwrite the original content(5) block all output from this commandfind/etc/-namepasswd >> Filee# #将所有的输出都保存在指定的文件里就好, because only one copy of the output, if the user specified the output location, it will not be displayed on the output interface(6)
Ah, it took a week to learn Io language because I was busy writing a draft of the oauth2.0 Server framework last week.
The answer to this exercise is followed by seven weeks and seven languages: understanding a variety of programming patterns; answers to the exercises after Ruby class
I/O is a prototype language, similar to Javascript, and does not distinguish between classes and objects. All things are obj
Fourth. List of exercises and their answers 1, what is []?A: An empty list value, which is a list that does not contain any list items. This is similar to the null string value.2, how to assign ' hello ' to the third value of the list, and the list is saved in a variable named spam? (Suppose the variable contains [2, 4, 6, 8, 10])A: spam[2] = ' Hello ' (note that the 3rd value in the list is subscript 2 bec
respectively;#!/bin/bash#J=0O=0For I in ' seq 1 ';d oIf [$ ($I%2) = 0]; Thenj=$[$J + $I]Elseo=$[$O + $I]FiDoneecho "SUM J is $J"echo "SU O is $O"=====================================================================Write a script that shows all the default shell-bash users and default shell-/sbin/nologin users on the current system, and counts the total number of users under each shell. The results appear as follows:Bash,3users,they is:Root,redhat,gentooNologin, 2users, they is:Bin,ftpcan be app
PHP and other mainstream languages). This mechanism is also used for constructors and destructors, overloads, and magic functions.
Class MyClass
{
protected function MyFunc () {
echo "Myclass::myfunc () n";
}
}
Class Otherclass extends MyClass
{
Overriding methods in a parent class
Public Function MyFunc ()
{
But you can still call methods that have been overridden
Parent::myfunc ();
echo "Otherclass::myfunc () n";
}
}
$class = new Otherclass ();
$class->myfunc ();
-----------------------------
, output baby buy dad Kitty0006. Binary conversionEnter a 16-binary string to convert to an integer output. function prototype unsigned int hex2int (const char* str). For example, enter the string "a12b" and the function returns the integer 41259.0007. Binary conversionConverts a 2 binary string to an integer output. function prototype unsigned int bin2int (const char* str). For example, enter the string "101001101100001" and the function returns an integer of 12345.0008. Algorithm design3 votes
1. invalid: 6_05 (cannot begin with a number)
A $ ($ is an invalid symbol ).
2. mybook (openbook, closebook, readbook, takebook, putbook ).
3. [mybook takebook];
[Mybook openbook];
[Mybook readbook];
[Mybook closebook];
[Mybook putbook];
4. [myboat driver];
[Mymotorcycle driver];
[Mycar driver];
Overlap.
5. Ease and reduce the memory (I understand that the question is not too clear ).
6. Understand the advantages and disadvantages of Procedural language and object-oriented language.
7.
// ------
+ A the + - $2. $ write out the results. - classDemo - { the Public Static voidMain (string[] args) - {WuyiShow (0);// the theShow (1);// - - } Wu Public Static voidShowinti) - { About Switch(i) $ { - default: -i+=2; - Case1: AI+=1; + Case4: theI+=8; - Case2: $I+=4; the } theSystem.out.println ("i=" +i); the } the } - in3. Writes out the result of the output. the classDemo t
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